Util Tools Developer Tools
Encoders, formatters, generators, and converters for everyday coding.
Encoding & Hashing
Base64 Encoder / Decoder
Encode or decode Base64 strings and files in your browser.
Open tool →URL Encoder / Decoder
Encode or decode URLs and query strings instantly.
Open tool →Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text or files.
Open tool →JWT Decoder
Decode and verify JSON Web Tokens - header, payload, expiry, and signature.
Open tool →HTML Entity Encoder / Decoder
Convert special characters to HTML entities and back.
Open tool →Formatters
JSON Formatter & Validator
Format, minify, and validate JSON with syntax highlighting and tree view.
Open tool →SQL Formatter
Format and beautify SQL queries across MySQL, PostgreSQL, SQLite, and MSSQL.
Open tool →YAML Validator & Formatter
Validate, format, and convert YAML to and from JSON.
Open tool →CSS Minifier & Beautifier
Minify CSS to shrink file size or beautify it for readability.
Open tool →HTML Formatter & Minifier
Format HTML for readability or minify it for production.
Open tool →Generators & Utilities
UUID Generator
Generate random UUID v1, v4, and v7 values instantly.
Open tool →Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Open tool →Color Code Converter
Convert colors between HEX, RGB, HSL, HSV, and CMYK with a picker.
Open tool →Color Palette Generator
Build palettes from a color or image - complementary, analogous, triadic, and more.
Open tool →Diff Checker
Compare two blocks of text with line-by-line highlighting.
Open tool →Free developer tools that run in your browser
This collection brings together the small utilities developers reach for every day: encoders and decoders, formatters and validators, converters, and generators. Each tool runs entirely client-side, so the code, tokens, and data you paste never leave your machine. That makes them safe to use with real configuration, API responses, and snippets you would not want to upload to a third-party server.
You will find formatters for JSON, SQL, HTML, and CSS that turn dense, machine-generated output into readable code (and back again for production), encoders for Base64, URL, and HTML entities, a JWT decoder, hash and UUID generators, a timestamp converter, and a YAML validator. Together they cover the routine parsing, cleaning, and inspecting tasks that interrupt real work.
Built for speed and privacy
Every tool loads instantly, works offline once the page is open, and requires no account or signup. Because processing happens locally with native browser APIs (including the Web Crypto API for anything that needs secure randomness), results are both fast and private. Pick a tool above to get started, or explore the related tools linked on each page.